Plasmonic interferometry in systems with single or multiple scatterers: experiments, simulations, and applications

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Overview

Title
Plasmonic interferometry in systems with single or multiple scatterers: experiments, simulations, and applications
Contributors
Flanigan, Patrick W (creator)
Pacifici, Domenico (Director)
Zaslavsky, Alexander (Reader)
Bahar, Iris (Reader)
Zia, Rashid (Reader)
Brown University. ENGINEERING: Electrical Sciences and Computer Engineering (sponsor)
Doi
10.7301/Z09P301B
Copyright Date
2015
Abstract
Plasmonics, a sub-field of nanophotonics, is a rich and growing field that studies the interaction between light and electron plasmas. One of the most important phenomena in this field is the surface plasmon polariton (SPP), a propagating electromagnetic mode that can be generated when light is incident upon a subwavelength feature on the interface between a metal and a dielectric. The relationship between the SPP’s dispersion relation and the refractive index of the interface materials is well known; what is less well known are (1) the exact process by which a nanoscale scatterer induces coupling and (2) the nature of constructive interference between SPPs emanating from different sources on the same surface. This thesis will present experimental and simulated data on these two topics, with a particular focus on the scattering of visible light by subwavelength indentations on the surface of silver films. Experimental data includes the fabrication and characterization of the “world’s smallest” plasmonic interferometer. Circular holes and rectangular slits will be discussed separately, as they exhibit very different scattering processes which affects how they can be used in real world applications. These results can be applied to a wide variety of plasmonic applications, including photovoltaics (via absorption enhancement of the active layer) and biosensors (via two-arm plasmonic interferometers).
Keywords
Plasmonics
photovoltaics
Nanophotonics
Photovoltaic power generation
Notes
Thesis (Ph.D. -- Brown University (2015)
Extent
vi, 119 p.

Citation

Flanigan, Patrick W., "Plasmonic interferometry in systems with single or multiple scatterers: experiments, simulations, and applications" (2015). Electrical Sciences and Computer Engineering Theses and Dissertations. Brown Digital Repository. Brown University Library. https://doi.org/10.7301/Z09P301B

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